body{
    padding-top: 125px;
}
header .user img{
    width: 18px;
    height: 14px;
    position: absolute;
    top: 15px;
    left: 20px;
}
nav{
    background-color: #fff;
    width: 100%;
    position: fixed;
    z-index: 1000;
    top: 45px;
}
.nav-index{
    width: 33.1%;
    float: left;
    text-align: center;
    font-size: 13px;
    color: #666;
    height: 80px;
    border-top: 1px solid rgb(250, 250, 250);
    border-bottom: 1px solid rgb(250, 250, 250);
    border-right: 1px solid rgb(250, 250, 250);
}
.nav-index:nth-child(3n){
    border-right: none;
}
.nav-index img{
    width: 28px;
    height: 28px;
    margin-top: 15px;
}
.matter-index{
    width: 48.5%;
    height: 190px;
    float: left;
    color: #CCC;
    border-bottom: 1px solid rgb(230, 230, 230);
}
.matter-index:nth-child(2n){
    float: right;
}
.matter-index h3{
    color: #333;
    font-weight: 700;
    margin: 2px 0 2px 5px;
}
.matter-index .pic{
    width: 100%;
    margin-top: 5px;
}
.matter-index p img{
    width: 14px;
    height: 14px;
    margin-left: 5px;
    margin-right: 5px;
}